Exterior of a truck cab



FIG. 1 is a left, front perspective view of an exterior of a truck cab showing our new design, it may be understood that the broken lines on all figures are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left side view of in FIG. 1;

FIG. 3 is a right side view of in FIG. 1;

FIG. 4 is a front view of in FIG. 1;

FIG. 5 is a back view of FIG. 1;

FIG. 6 is a top view of FIG. 1;

FIG. 7 is a left side view of an exterior view of a truck cab showing a second embodiment of the our new design, with the top and rear portions removed and not being claimed as part of the design;

FIG. 8 is a right side view of in FIG. 7; and,

FIG. 9 is a front view of in FIG. 7. 

The ornamental design for an exterior of a truck cab, as shown and described. 